Ncstar VMML6 M-LOK® Picatinny 9 Slot Accessory rail. Mounts onto M-LOK® Spec handguards. Medium rail covers 2½ M-LOK® slots. Mounts with three screws and M-LOK® compatible T-Nuts. 9 Slot Picatinny rail. Rounded profile rail ends for a more comfortable hold when used as a hand stop. Perfect for mounting Accessories with Weaver/ Picatinny mounts like flashlights and lasers to your M-LOK® handguards. Black Anodized Aluminum Construction.